How to express feature modeling and decide geometric drawing parametry is key technology of parts parametric feature modeling design. 如何實現(xiàn)特征模型的表達和幾何圖形參數(shù)的確定是零件參數(shù)化特征造型設(shè)計的關(guān)鍵技術(shù)。
Parametric rolling is a kind of the resonance phenomena of ship motions, caused by the periodical fluctuations of stability parameters of ships in waves. 參數(shù)橫搖是指船舶在波浪中由于自身系統(tǒng)中穩(wěn)性參數(shù)的周期性變化所引起的船體梁橫搖共振運動現(xiàn)象。